Combination cutting and rolling tool



TE'S

HENRY ngnmvnns, or LOS enemas, CALIFORNIA.

GOMBINATI ON CUTTING AND MLLING TOOL Application filed February 12, 1924. Serial No. 092,845.

2' '0 all whom it may concern:

Be it known that I, HnNnYE. DnAvEas, aeitizen of the United States, residing at Los Aug'cles, in the county of Los Angeles and State of California, have invented new and useful improvements in Combination Cutting and Rolling Tools, of which the following is a specification.

This improvementrelates to improvements in .a combination cutting tool and pipe straightener, more especially designed for emitting-away metal drillin tools that have been broken 01f and lo ged, in the well in such a position that'the drillers are unable torccover or dislodge the same, and

at the same time to effectually -straightmi :u-cidently deformed well casing.

It is the object of this invention to 'proride a combination tool inwhich the cut ting or milling element maybe readily changed from one form to another to suit varyingconditions. I v

A further object of the. invention is to provide a combination tool which may be convenientlyutilized in cutting through brokengmetal drilling tools that may become wedged in a well and the well casing in order to continue the operations of well drilling at .a different angle or inclination from that originally intended.

Further objects and advantages'will be apparent from the following description, reference being had to the drawings ac eompanying the same in which;

Fig. 1 is a central vertical section through the lower end of an oil well with thecasing in position illustrating the application of the improved tool.

Fig. 2- is a side elevation of the tool. Fig. 3 is a central vertical section of the tool.

The straightening tool herewith illustrated and described is designed for use in connection with wells in which further drilling has been abandoned by reason of the lodgement of broken drilling, tools, drill pipe, couplings, etc., which the drillers are unable to dislodge or recover. In suchsituations, drillers oftentimes continue the drilling operations at a slightly different angle crinclination in order to avoid the obstructions in the well. By means of the improved tool,

the drillinoof an obstructed well can be readily an quickly proceeded with, as the cutting end of the tool will effectually cut combination cutting and pipe away the metallic obstructions, and at the time the rollers will straighten out the deformed well casing, and thus enable the drillers to insert other well casing through the original casing to encase the newly drilled portion of the well.

In the drawings hereto attached, the complete tool consists of a pipe straightening member 6, and a milling or cutting member 7 detachably secured to one another. The frame portion 8 of the straightening memher, is provided with a centrally dis oscd bore 9 for the passage therethrough' o mud laden water during the operation of the tool.

Formed integrally with the extreme upper end of the frame 8 is a threaded tapered pin 10 for the purpose of detachabl securing the tool to the lower threade end of a rotary drill pipe of usual construction. Theepposite end of the frame is also provided with a threaded taper pin 11 for det'achably securing the cutting member 7 thereto. At the base of threaded pin 10' is formed a circular bearing flange'12' provided with a pluralit' of c'ircularl arranged e ually spaced ores 13 for t e reception o the up or headed ends of a like number of roller bearing pins 14, each carrying a bearing roller 15, their u 1 ends 16 being of cylindrical form, w do their lower ends 17 ta er downwardly'to their lower ends. The rame 8 directly below the bearing flange is cylindrical in form foron the lower end of the frame to secure the 4 straightening and cutting members together. The lower end of the cutting member is provided witha centrally disposed cylindrical threaded cavity 21, which is engaged by a screw threaded plug 22 provide with a centrally disposed longitudinally extending bore 23 for the'passage of mud laden water therethrough, the outer end of plug end 22 being frusto conical in configuration. Formed in the conical face of the plug are a plurality of radiallydisposed rabbeted tapered slots 24, equally spaced apart; Removably mounted 'in each slot are tapered cutting teeth 25 whose side-walls engage the rabbeted side walls of the slots 24, the longitudinally extending side edges 26 of the exposed portion of the cutting teeth constitute the cutting edges.

The bottom wall of cutting member 7 is bevelled downwardly and outwardly from the periphery of the circular threaded cavity 21, and is provided with a plurality of radially disposedrabbeted tapered slots 27, in which are mounted cutting teeth 28, of the same general configuration as the cutting teeth 25 mounted on the conical face of plug 22. Threaded socket 20 and cavity 21 are connected by a bore 29 for the passage of the mud laden water from the bore 9 to the cutting tool. The top wall of the cutting member 7 is provided with a plurality of circularly'arranged cylindrical recesses for the reception ofthe reduced lower ends. of bearing ins14. f p

In or er to provide for anyundue or unusual strain that might be imposed on the roller 17 during an operation of the device, I have provided downwardly extendin lugs 30, preferably formed integral witfi the flange 12 formed on the frame 6,.the side faces of each lug being concaved longitudinal1y and of a depth to permit ofthe free rotation of the variousrollers during the operation,

. From this construction it will be apparent that should one of the roller pins become broken or bent during the operation of the device, the lugs will tend to prevent a displacement of the rollers.

In operation the device is attached to the the well, the cutting member will mill the metal parts away or force the same to one side of the formation. ()ftentimes the drillers in order to pass the obstructions in the bottom of the well, have to drill a new hole,

and drill at a different angle or inclination. In such cases the cutting tool is often forced through the well casing, the roller bearings of the pipe straightener following up and straightening the edgeof the drilled aperture in the casing so as to permit the passage therethrough of well casing of lesser diameter.

What I claim is:

In agdevice of the class described, comprisinga frame member adapted for rotary movement, a plurality of pipe strai htening rollers. mounted in bearings forme .in said frame, the upperendsof said rollers being of cylindrical form and their lower ends conical, and a cutting tool secured to the frame below the rollers, whereby when the device is mounted in a deformed casing having obstructions disposed therein it will operate to straighten the casing and to cut away the obstructions.

In witness that I claim the foregoing I have hereunto subscribed my name this 14th day of. January, 1924.

- H. E. DEAVERS. 

